He didn't testify for one very good reason: PER-JUR-REEMost defendants don't testify. From what I read he didn't testify because the questioning of him would not have been limited to this case but that they could ask him about a lot more. A no win situation.
Not to mention this was the first time this type of case was brought in New York where they used crimes passed the statures of limitations to prove another crime. There might be constitutional issue or due process issues. I don't know we will see.
Donnie can't form a sentence without lying of he somehow managed to avoid perjury and contempt of court he would have gotten a hung jury. Only 1 of the 12 jurors would have to believe his lies are true. His defense team was horrible and lost right out of the gate in the opening arguments when they said they will prove that donnies little mushroom dick never went inside stormy. Cohen had Trump on tape and David pecker was the only credible witness who also said trumps intent on killing these stories was to win the election
If trump was really innocent he would ha e testified and told the truth to set the reocrf straight. Instead he just made stupid faces while he shit his pants and slept